Sounds like a scam. If you deposit the check, they will then have your bank information. The check will bounce, and the will, or at least they will try, to steal your money. Disability funds are not usually taxable. So why all the discussion about paying state and federal taxes on the money. You know such taxes are not typically paid up front. Please throw this stuff away. If you filed for a grant program, please contact these folks to see if the correspondence is from them before you do anything. But I suspect it is not from them.